模拟队列C语言实现

#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#define N 10000010
int num[N];
int hh = 0, ht = 0; // 定义队头和队尾

int main() {
    int m;
    scanf("%d", &m);
    while (m -- ) {
        char op[100] = "";
        scanf("%s", op);
        if (strcmp(op, "push") == 0) {
            int x;
            scanf("%d", &x);
            num[ht ++ ] = x;
        }
        else if (strcmp(op, "pop") == 0) {
            hh ++;
        }
        else if (strcmp(op, "empty") == 0) {
            if (hh == ht) puts("YES");
            else puts("NO");
        }
        else if (strcmp(op, "query") == 0) {
            int res = num[hh];
            printf("%d\n", res);
        }
    }
    return 0;
}